Apparatus for spinning tubular bodies made of cellulose



J. VOSS ET AL Aug. 23, 1932.

APPARATUS FOR SPINNING TUBULAR BODIES MADE OF CELLULOSE Filed Feb. 20, 1929 v ark" war.

Patented Aug. 23, 1932 UNITED STATES PATENT OFFICE JULIUS VOSS AND ARTHUR SCHADE, OF WIESBADEN-BIEBRIGH, GERMANY, ASSIGN- ORS, BY MESN E ASSIGNMENTS, TO THE VISKIN G CORPORATION, OF CHICAGO, ILLI- NOIS, A CORPORATION OF VIRGINIA APPARATUS FOR SPINNING TUBULAR BODIES MADE OF CELLULOSE Application filed February 20, 1929, Serial No. 341,433, and in Germany February 23, 1928.

The present invention relates to an apparatus for spinning tubular bodies made of cellulose.

We have found that in apparatus as they are in use for spinning tubular bodies made of cellulose, the spinning start easily takes place by employing in the first place an annular nozzle which is open at both ends, and by placing into the said nozzle a specially formed core the size of which can be adjusted upwards and downwards. ,Any difiiculties caused by the conduit for the precipitating bath and the nozzle becoming clogged are avoided and the change of the tubular body into a band-like form also takes place without the latter becoming wrinkled. A'device of the above described kind is illustrated in the accompanying drawing, in which Fig. 1 is a vertical section through one form of apparatus and Fig. 2 is a fragmentary view, partially in cross section, showing a modified form of a detail.

In Fig. 1, D is an annular nozzle which is open at both ends the nozzle is provided with inlet pipes V and V through which viscose is introduced. Within the nozzle a bar Sis fitted the upper part of which is movable and which is provided with a number of rings R R R etc., and ends in a triangular piece B as shown on thedrawing. The member B may be in the form of a closed triangle but its lower rim may also be discontinuous or made in such a manner that its width can be adjusted as desired.

In Fig. 2 elements S and B correspond to elements S and B, respectively, of Fig. 1. The tube S is provided with a number of rings R and R and carries at its lower end a triangular piece B which is connected to S by means ofmovable members as shown on the drawing. A. bar H situated within the tube S when moved upwards or downwards, enlarges or reduces respectively, the width of the element B 7 The tubular body is made in the following manner: The core (tube S with the rings R) is lifted out of the nozzle D; the viscose is then pressed into the precipitating bath through the tubes V and V and the inferior part of the nozzle D; the tubular body is then distended by introducing the precipitating bath inside the tubular body. The core S is then caused to descend gradually into the tubular body and the element B is adj usted to the desired width. The tubular body is supported during the precipitation process by the rings R; the latter also give the precipitating bath everywhere access to the tubular body and assure also a constantly uniform composition of the precipitating bath inside the tubular body. The element B causes the tubular body to pass into a bandlike form without the edges becoming bent over.

'We claim:

1. In an apparatus for spinning from above downwards tubular bodies made of cellulose, an annular nozzle open on both ends, and a core which can be freely moved upwards and downwards inside of the nozzle.

2. In an apparatus for spinning from above downwards tubular bodies made of cellulose, an annular nozzle open on both ends, and a core which can be freely moved upwards and. downwards inside of the nozzle, which core is provided with at least one ring and at its lower part with a triangular piece.

3. In an apparatus for spinning from above downwards tubular bodies made of cellulose, an annular nozzle open on both ends, and a core which can be freely moved upwards and downwards inside of the nozzle, which core is provided with at least one ring and at its lower part with a triangular piece,

the width of which can be adjusted.

In testimony whereof, we ailix our signatures.

JULIUS .VOSS. ARTHUR SCHADE. 

